The article also gives a possible explanation to why humans have oversized brains. “Just as the elk measures the size of antlers, we humans measure each other’s brains before we mate,” Peter Bøckman at the University of Oslo explains.

Two years ago the University of Oslo had an exhibition made by Peter Bøckman about homophilia in the animal kingdom. The new exhibition, named Sexus, about sexual behaviour is probably going to be an even greater success.